--  @testpoint:opengauss关键字real(非保留)，作为函数名

--关键字不带引号-合理报错
drop function if exists real;
create function real(i integer)
returns integer
as $$
begin
    return i+1;
end;
$$ language plpgsql;
/

--关键字带双引号-成功
drop function if exists "real";
create function "real"(i integer)
returns integer
as $$
begin
    return i+1;
end;
$$ language plpgsql;
/
drop function "real";
--关键字带单引号-合理报错
drop function if exists 'real';
create function 'real'(i integer)
returns integer
as $$
begin
    return i+1;
end;
$$ language plpgsql;
/
--关键字带反引号-合理报错
drop function if exists `real`;
create function `real`(i integer)
returns integer
as $$
begin
    return i+1;
end;
$$ language plpgsql;
/
